/*
 * @BEGIN LICENSE
 *
 * Psi4: an open-source quantum chemistry software package
 *
 * Copyright (c) 2007-2025 The Psi4 Developers.
 *
 * The copyrights for code used from other parties are included in
 * the corresponding files.
 *
 * This file is part of Psi4.
 *
 * Psi4 is free software; you can redistribute it and/or modify
 * it under the terms of the GNU Lesser General Public License as published by
 * the Free Software Foundation, version 3.
 *
 * Psi4 is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU Lesser General Public License for more details.
 *
 * You should have received a copy of the GNU Lesser General Public License along
 * with Psi4; if not, write to the Free Software Foundation, Inc.,
 * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
 *
 * @END LICENSE
 */

/*! \file
    \ingroup CCLAMBDA
    \brief Enter brief description of file here
*/
#include <cstdio>
#include "psi4/libdpd/dpd.h"
#include "cclambda.h"
#include "MOInfo.h"
#include "Params.h"
#define EXTERN
#include "globals.h"

namespace psi {
namespace cclambda {

void CCLambdaWavefunction::init_amps(const struct L_Params& L_params) {
    double norm;
    dpdfile2 T1, R1, LIA, Lia, dIA, dia, XIA, Xia;
    dpdbuf4 T2, R2, LIJAB, Lijab, LIjAb, dIJAB, dijab, dIjAb, XIJAB, Xijab, XIjAb;
    char R1A_lbl[32], R1B_lbl[32], R2AA_lbl[32], R2BB_lbl[32], R2AB_lbl[32];
    int L_irr;
    L_irr = L_params.irrep;

    /* if solving zeta equations, initial guess is Xi * denom */
    if (params.zeta) {
        if (params.ref == 0) { /* RHF */
            global_dpd_->file2_init(&XIA, PSIF_EOM_XI, L_irr, 0, 1, "XIA");
            global_dpd_->file2_copy(&XIA, PSIF_CC_LAMBDA, "LIA");
            global_dpd_->file2_close(&XIA);
            global_dpd_->file2_init(&LIA, PSIF_CC_LAMBDA, L_irr, 0, 1, "LIA");
            global_dpd_->file2_init(&dIA, PSIF_CC_DENOM, L_irr, 0, 1, "dIA");
            global_dpd_->file2_dirprd(&dIA, &LIA);
            global_dpd_->file2_close(&dIA);
            global_dpd_->file2_close(&LIA);

            global_dpd_->buf4_init(&XIjAb, PSIF_EOM_XI, L_irr, 0, 5, 0, 5, 0, "XIjAb");
            global_dpd_->buf4_copy(&XIjAb, PSIF_CC_LAMBDA, "LIjAb");
            global_dpd_->buf4_close(&XIjAb);
            global_dpd_->buf4_init(&LIjAb, PSIF_CC_LAMBDA, L_irr, 0, 5, 0, 5, 0, "LIjAb");
            global_dpd_->buf4_init(&dIjAb, PSIF_CC_DENOM, L_irr, 0, 5, 0, 5, 0, "dIjAb");
            global_dpd_->buf4_dirprd(&dIjAb, &LIjAb);
            global_dpd_->buf4_close(&dIjAb);
            global_dpd_->buf4_close(&LIjAb);
        } else if (params.ref == 1) { /* ROHF */
            global_dpd_->file2_init(&XIA, PSIF_EOM_XI, L_irr, 0, 1, "XIA");
            global_dpd_->file2_copy(&XIA, PSIF_CC_LAMBDA, "LIA");
            global_dpd_->file2_close(&XIA);
            global_dpd_->file2_init(&LIA, PSIF_CC_LAMBDA, L_irr, 0, 1, "LIA");
            global_dpd_->file2_init(&dIA, PSIF_CC_DENOM, L_irr, 0, 1, "dIA");
            global_dpd_->file2_dirprd(&dIA, &LIA);
            global_dpd_->file2_close(&dIA);
            global_dpd_->file2_close(&LIA);

            global_dpd_->file2_init(&Xia, PSIF_EOM_XI, L_irr, 0, 1, "Xia");
            global_dpd_->file2_copy(&Xia, PSIF_CC_LAMBDA, "Lia");
            global_dpd_->file2_close(&Xia);
            global_dpd_->file2_init(&Lia, PSIF_CC_LAMBDA, L_irr, 0, 1, "Lia");
            global_dpd_->file2_init(&dia, PSIF_CC_DENOM, L_irr, 0, 1, "dia");
            global_dpd_->file2_dirprd(&dia, &Lia);
            global_dpd_->file2_close(&dia);
            global_dpd_->file2_close(&Lia);

            global_dpd_->buf4_init(&XIJAB, PSIF_EOM_XI, L_irr, 2, 7, 2, 7, 0, "XIJAB");
            global_dpd_->buf4_copy(&XIJAB, PSIF_CC_LAMBDA, "LIJAB");
            global_dpd_->buf4_close(&XIJAB);
            global_dpd_->buf4_init(&LIJAB, PSIF_CC_LAMBDA, L_irr, 2, 7, 2, 7, 0, "LIJAB");
            global_dpd_->buf4_init(&dIJAB, PSIF_CC_DENOM, L_irr, 2, 7, 2, 7, 0, "dIJAB");
            global_dpd_->buf4_dirprd(&dIJAB, &LIJAB);
            global_dpd_->buf4_close(&dIJAB);
            global_dpd_->buf4_close(&LIJAB);

            global_dpd_->buf4_init(&Xijab, PSIF_EOM_XI, L_irr, 2, 7, 2, 7, 0, "Xijab");
            global_dpd_->buf4_copy(&Xijab, PSIF_CC_LAMBDA, "Lijab");
            global_dpd_->buf4_close(&Xijab);
            global_dpd_->buf4_init(&Lijab, PSIF_CC_LAMBDA, L_irr, 2, 7, 2, 7, 0, "Lijab");
            global_dpd_->buf4_init(&dijab, PSIF_CC_DENOM, L_irr, 2, 7, 2, 7, 0, "dijab");
            global_dpd_->buf4_dirprd(&dijab, &Lijab);
            global_dpd_->buf4_close(&dijab);
            global_dpd_->buf4_close(&Lijab);

            global_dpd_->buf4_init(&XIjAb, PSIF_EOM_XI, L_irr, 0, 5, 0, 5, 0, "XIjAb");
            global_dpd_->buf4_copy(&XIjAb, PSIF_CC_LAMBDA, "LIjAb");
            global_dpd_->buf4_close(&XIjAb);
            global_dpd_->buf4_init(&LIjAb, PSIF_CC_LAMBDA, L_irr, 0, 5, 0, 5, 0, "LIjAb");
            global_dpd_->buf4_init(&dIjAb, PSIF_CC_DENOM, L_irr, 0, 5, 0, 5, 0, "dIjAb");
            global_dpd_->buf4_dirprd(&dIjAb, &LIjAb);
            global_dpd_->buf4_close(&dIjAb);
            global_dpd_->buf4_close(&LIjAb);
        } else if (params.ref == 2) { /** UHF **/
            global_dpd_->file2_init(&XIA, PSIF_EOM_XI, L_irr, 0, 1, "XIA");
            global_dpd_->file2_copy(&XIA, PSIF_CC_LAMBDA, "LIA");
            global_dpd_->file2_close(&XIA);
            global_dpd_->file2_init(&LIA, PSIF_CC_LAMBDA, L_irr, 0, 1, "LIA");
            global_dpd_->file2_init(&dIA, PSIF_CC_DENOM, L_irr, 0, 1, "dIA");
            global_dpd_->file2_dirprd(&dIA, &LIA);
            global_dpd_->file2_close(&dIA);
            global_dpd_->file2_close(&LIA);

            global_dpd_->file2_init(&Xia, PSIF_EOM_XI, L_irr, 2, 3, "Xia");
            global_dpd_->file2_copy(&Xia, PSIF_CC_LAMBDA, "Lia");
            global_dpd_->file2_close(&Xia);
            global_dpd_->file2_init(&Lia, PSIF_CC_LAMBDA, L_irr, 2, 3, "Lia");
            global_dpd_->file2_init(&dia, PSIF_CC_DENOM, L_irr, 2, 3, "dia");
            global_dpd_->file2_dirprd(&dia, &Lia);
            global_dpd_->file2_close(&dia);
            global_dpd_->file2_close(&Lia);

            global_dpd_->buf4_init(&XIJAB, PSIF_EOM_XI, L_irr, 2, 7, 2, 7, 0, "XIJAB");
            global_dpd_->buf4_copy(&XIJAB, PSIF_CC_LAMBDA, "LIJAB");
            global_dpd_->buf4_close(&XIJAB);
            global_dpd_->buf4_init(&LIJAB, PSIF_CC_LAMBDA, L_irr, 2, 7, 2, 7, 0, "LIJAB");
            global_dpd_->buf4_init(&dIJAB, PSIF_CC_DENOM, L_irr, 2, 7, 2, 7, 0, "dIJAB");
            global_dpd_->buf4_dirprd(&dIJAB, &LIJAB);
            global_dpd_->buf4_close(&dIJAB);
            global_dpd_->buf4_close(&LIJAB);

            global_dpd_->buf4_init(&Xijab, PSIF_EOM_XI, L_irr, 12, 17, 12, 17, 0, "Xijab");
            global_dpd_->buf4_copy(&Xijab, PSIF_CC_LAMBDA, "Lijab");
            global_dpd_->buf4_close(&Xijab);
            global_dpd_->buf4_init(&Lijab, PSIF_CC_LAMBDA, L_irr, 12, 17, 12, 17, 0, "Lijab");
            global_dpd_->buf4_init(&dijab, PSIF_CC_DENOM, L_irr, 12, 17, 12, 17, 0, "dijab");
            global_dpd_->buf4_dirprd(&dijab, &Lijab);
            global_dpd_->buf4_close(&dijab);
            global_dpd_->buf4_close(&Lijab);

            global_dpd_->buf4_init(&XIjAb, PSIF_EOM_XI, L_irr, 22, 28, 22, 28, 0, "XIjAb");
            global_dpd_->buf4_copy(&XIjAb, PSIF_CC_LAMBDA, "LIjAb");
            global_dpd_->buf4_close(&XIjAb);
            global_dpd_->buf4_init(&LIjAb, PSIF_CC_LAMBDA, L_irr, 22, 28, 22, 28, 0, "LIjAb");
            global_dpd_->buf4_init(&dIjAb, PSIF_CC_DENOM, L_irr, 22, 28, 22, 28, 0, "dIjAb");
            global_dpd_->buf4_dirprd(&dIjAb, &LIjAb);
            global_dpd_->buf4_close(&dIjAb);
            global_dpd_->buf4_close(&LIjAb);
        }
        return;
    }

    /* ground state guess L <= T */
    /* excited state guess L <= R0 * T + R */
    if (L_params.ground || L_params.irrep == 0) {
        if (params.ref == 0) { /** RHF **/
            if (!params.restart || !psio_tocscan(PSIF_CC_LAMBDA, "LIA")) {
                global_dpd_->file2_init(&T1, PSIF_CC_OEI, 0, 0, 1, "tIA");
                global_dpd_->file2_copy(&T1, PSIF_CC_LAMBDA, "LIA");
                global_dpd_->file2_copy(&T1, PSIF_CC_LAMBDA, "Lia");
                global_dpd_->file2_close(&T1);
            } else
                outfile->Printf("\tUsing old L1 amplitudes.\n");

            if (!params.restart || !psio_tocscan(PSIF_CC_LAMBDA, "LIjAb")) {
                global_dpd_->buf4_init(&T2, PSIF_CC_TAMPS, 0, 0, 5, 0, 5, 0, "tIjAb");
                global_dpd_->buf4_copy(&T2, PSIF_CC_LAMBDA, "LIjAb");
                global_dpd_->buf4_close(&T2);
            } else
                outfile->Printf("\tUsing old L2 amplitudes.\n");

            global_dpd_->buf4_init(&T2, PSIF_CC_LAMBDA, 0, 2, 7, 0, 5, 1, "LIjAb");
            global_dpd_->buf4_copy(&T2, PSIF_CC_LAMBDA, "LIJAB");
            global_dpd_->buf4_copy(&T2, PSIF_CC_LAMBDA, "Lijab");
            global_dpd_->buf4_close(&T2);
        } else if (params.ref == 1) { /** ROHF **/
            if (!params.restart || !psio_tocscan(PSIF_CC_LAMBDA, "LIA") || !psio_tocscan(PSIF_CC_LAMBDA, "Lia")) {
                global_dpd_->file2_init(&T1, PSIF_CC_OEI, 0, 0, 1, "tIA");
                global_dpd_->file2_copy(&T1, PSIF_CC_LAMBDA, "LIA");
                global_dpd_->file2_close(&T1);

                global_dpd_->file2_init(&T1, PSIF_CC_OEI, 0, 0, 1, "tia");
                global_dpd_->file2_copy(&T1, PSIF_CC_LAMBDA, "Lia");
                global_dpd_->file2_close(&T1);
            } else
                outfile->Printf("\tUsing old L1 amplitudes.\n");

            if (!params.restart || !psio_tocscan(PSIF_CC_LAMBDA, "LIjAb") || !psio_tocscan(PSIF_CC_LAMBDA, "LIJAB") ||
                !psio_tocscan(PSIF_CC_LAMBDA, "Lijab")) {
                global_dpd_->buf4_init(&T2, PSIF_CC_TAMPS, 0, 2, 7, 2, 7, 0, "tIJAB");
                global_dpd_->buf4_copy(&T2, PSIF_CC_LAMBDA, "LIJAB");
                global_dpd_->buf4_close(&T2);

                global_dpd_->buf4_init(&T2, PSIF_CC_TAMPS, 0, 2, 7, 2, 7, 0, "tijab");
                global_dpd_->buf4_copy(&T2, PSIF_CC_LAMBDA, "Lijab");
                global_dpd_->buf4_close(&T2);

                global_dpd_->buf4_init(&T2, PSIF_CC_TAMPS, 0, 0, 5, 0, 5, 0, "tIjAb");
                global_dpd_->buf4_copy(&T2, PSIF_CC_LAMBDA, "LIjAb");
                global_dpd_->buf4_close(&T2);
            } else
                outfile->Printf("\tUsing old L2 amplitudes.\n");
        } else if (params.ref == 2) { /** UHF **/
            if (!params.restart || !psio_tocscan(PSIF_CC_LAMBDA, "LIA") || !psio_tocscan(PSIF_CC_LAMBDA, "Lia")) {
                global_dpd_->file2_init(&T1, PSIF_CC_OEI, 0, 0, 1, "tIA");
                global_dpd_->file2_copy(&T1, PSIF_CC_LAMBDA, "LIA");
                global_dpd_->file2_close(&T1);

                global_dpd_->file2_init(&T1, PSIF_CC_OEI, 0, 2, 3, "tia");
                global_dpd_->file2_copy(&T1, PSIF_CC_LAMBDA, "Lia");
                global_dpd_->file2_close(&T1);
            } else
                outfile->Printf("\tUsing old L1 amplitudes.\n");

            if (!params.restart || !psio_tocscan(PSIF_CC_LAMBDA, "LIjAb") || !psio_tocscan(PSIF_CC_LAMBDA, "LIJAB") ||
                !psio_tocscan(PSIF_CC_LAMBDA, "Lijab")) {
                global_dpd_->buf4_init(&T2, PSIF_CC_TAMPS, 0, 2, 7, 2, 7, 0, "tIJAB");
                global_dpd_->buf4_copy(&T2, PSIF_CC_LAMBDA, "LIJAB");
                global_dpd_->buf4_close(&T2);

                global_dpd_->buf4_init(&T2, PSIF_CC_TAMPS, 0, 12, 17, 12, 17, 0, "tijab");
                global_dpd_->buf4_copy(&T2, PSIF_CC_LAMBDA, "Lijab");
                global_dpd_->buf4_close(&T2);

                global_dpd_->buf4_init(&T2, PSIF_CC_TAMPS, 0, 22, 28, 22, 28, 0, "tIjAb");
                global_dpd_->buf4_copy(&T2, PSIF_CC_LAMBDA, "LIjAb");
                global_dpd_->buf4_close(&T2);
            } else
                outfile->Printf("\tUsing old L2 amplitudes.\n");
        }
    }

    if (!L_params.ground) {
        sprintf(R1A_lbl, "RIA %d %d", L_params.irrep, L_params.root);
        sprintf(R1B_lbl, "Ria %d %d", L_params.irrep, L_params.root);
        sprintf(R2AA_lbl, "RIJAB %d %d", L_params.irrep, L_params.root);
        sprintf(R2BB_lbl, "Rijab %d %d", L_params.irrep, L_params.root);
        sprintf(R2AB_lbl, "RIjAb %d %d", L_params.irrep, L_params.root);

        /* multiply by R0 and create nonsymmetric L files */
        global_dpd_->file2_init(&LIA, PSIF_CC_LAMBDA, L_irr, 0, 1, "LIA");
        global_dpd_->buf4_init(&LIJAB, PSIF_CC_LAMBDA, L_irr, 2, 7, 2, 7, 0, "LIJAB");
        if (params.ref <= 1) {
            global_dpd_->file2_init(&Lia, PSIF_CC_LAMBDA, L_irr, 0, 1, "Lia");
            global_dpd_->buf4_init(&Lijab, PSIF_CC_LAMBDA, L_irr, 2, 7, 2, 7, 0, "Lijab");
            global_dpd_->buf4_init(&LIjAb, PSIF_CC_LAMBDA, L_irr, 0, 5, 0, 5, 0, "LIjAb");
        } else {
            global_dpd_->file2_init(&Lia, PSIF_CC_LAMBDA, L_irr, 2, 3, "Lia");
            global_dpd_->buf4_init(&Lijab, PSIF_CC_LAMBDA, L_irr, 12, 17, 12, 17, 0, "Lijab");
            global_dpd_->buf4_init(&LIjAb, PSIF_CC_LAMBDA, L_irr, 22, 28, 22, 28, 0, "LIjAb");
        }

        global_dpd_->file2_scm(&LIA, L_params.R0);
        global_dpd_->file2_scm(&Lia, L_params.R0);
        global_dpd_->buf4_scm(&LIJAB, L_params.R0);
        global_dpd_->buf4_scm(&Lijab, L_params.R0);
        global_dpd_->buf4_scm(&LIjAb, L_params.R0);

        /* add R1 and R2 */
        global_dpd_->file2_init(&R1, PSIF_CC_RAMPS, L_irr, 0, 1, R1A_lbl);
        global_dpd_->file2_axpy(&R1, &LIA, 1.0, 0);
        global_dpd_->file2_close(&R1);
        global_dpd_->buf4_init(&R2, PSIF_CC_RAMPS, L_irr, 2, 7, 2, 7, 0, R2AA_lbl);
        global_dpd_->buf4_axpy(&R2, &LIJAB, 1.0);
        global_dpd_->buf4_close(&R2);

        if (params.ref <= 1) {
            global_dpd_->file2_init(&R1, PSIF_CC_RAMPS, L_irr, 0, 1, R1B_lbl);
            global_dpd_->file2_axpy(&R1, &Lia, 1.0, 0);
            global_dpd_->file2_close(&R1);
            global_dpd_->buf4_init(&R2, PSIF_CC_RAMPS, L_irr, 2, 7, 2, 7, 0, R2BB_lbl);
            global_dpd_->buf4_axpy(&R2, &Lijab, 1.0);
            global_dpd_->buf4_close(&R2);
            global_dpd_->buf4_init(&R2, PSIF_CC_RAMPS, L_irr, 0, 5, 0, 5, 0, R2AB_lbl);
            global_dpd_->buf4_axpy(&R2, &LIjAb, 1.0);
            global_dpd_->buf4_close(&R2);
        } else {
            global_dpd_->file2_init(&R1, PSIF_CC_RAMPS, L_irr, 2, 3, R1B_lbl);
            global_dpd_->file2_axpy(&R1, &Lia, 1.0, 0);
            global_dpd_->file2_close(&R1);
            global_dpd_->buf4_init(&R2, PSIF_CC_RAMPS, L_irr, 12, 17, 12, 17, 0, R2BB_lbl);
            global_dpd_->buf4_axpy(&R2, &Lijab, 1.0);
            global_dpd_->buf4_close(&R2);
            global_dpd_->buf4_init(&R2, PSIF_CC_RAMPS, L_irr, 22, 28, 22, 28, 0, R2AB_lbl);
            global_dpd_->buf4_axpy(&R2, &LIjAb, 1.0);
            global_dpd_->buf4_close(&R2);
        }

        /* dot L and R together */
        global_dpd_->file2_init(&R1, PSIF_CC_RAMPS, L_irr, 0, 1, R1A_lbl);
        norm = global_dpd_->file2_dot(&LIA, &R1);
        global_dpd_->file2_close(&R1);
        global_dpd_->buf4_init(&R2, PSIF_CC_RAMPS, L_irr, 2, 7, 2, 7, 0, R2AA_lbl);
        norm += global_dpd_->buf4_dot(&LIJAB, &R2);
        global_dpd_->buf4_close(&R2);
        if (params.ref <= 1) {
            global_dpd_->file2_init(&R1, PSIF_CC_RAMPS, L_irr, 0, 1, R1B_lbl);
            norm += global_dpd_->file2_dot(&Lia, &R1);
            global_dpd_->file2_close(&R1);
            global_dpd_->buf4_init(&R2, PSIF_CC_RAMPS, L_irr, 2, 7, 2, 7, 0, R2BB_lbl);
            norm += global_dpd_->buf4_dot(&Lijab, &R2);
            global_dpd_->buf4_close(&R2);
            global_dpd_->buf4_init(&R2, PSIF_CC_RAMPS, L_irr, 0, 5, 0, 5, 0, R2AB_lbl);
            norm += global_dpd_->buf4_dot(&LIjAb, &R2);
            global_dpd_->buf4_close(&R2);
        } else {
            global_dpd_->file2_init(&R1, PSIF_CC_RAMPS, L_irr, 2, 3, R1B_lbl);
            norm += global_dpd_->file2_dot(&Lia, &R1);
            global_dpd_->file2_close(&R1);
            global_dpd_->buf4_init(&R2, PSIF_CC_RAMPS, L_irr, 12, 17, 12, 17, 0, R2BB_lbl);
            norm += global_dpd_->buf4_dot(&Lijab, &R2);
            global_dpd_->buf4_close(&R2);
            global_dpd_->buf4_init(&R2, PSIF_CC_RAMPS, L_irr, 22, 28, 22, 28, 0, R2AB_lbl);
            norm += global_dpd_->buf4_dot(&LIjAb, &R2);
            global_dpd_->buf4_close(&R2);
        }

        outfile->Printf("\tInitial overlap of initial guess <L|R> = %15.10lf\n", norm);

        global_dpd_->file2_scm(&LIA, 1.0 / norm);
        global_dpd_->file2_scm(&Lia, 1.0 / norm);
        global_dpd_->buf4_scm(&LIJAB, 1.0 / norm);
        global_dpd_->buf4_scm(&Lijab, 1.0 / norm);
        global_dpd_->buf4_scm(&LIjAb, 1.0 / norm);

        global_dpd_->file2_init(&R1, PSIF_CC_RAMPS, L_irr, 0, 1, R1A_lbl);
        norm = global_dpd_->file2_dot(&LIA, &R1);
        global_dpd_->file2_close(&R1);
        global_dpd_->buf4_init(&R2, PSIF_CC_RAMPS, L_irr, 2, 7, 2, 7, 0, R2AA_lbl);
        norm += global_dpd_->buf4_dot(&LIJAB, &R2);
        global_dpd_->buf4_close(&R2);

        if (params.ref <= 1) {
            global_dpd_->file2_init(&R1, PSIF_CC_RAMPS, L_irr, 0, 1, R1B_lbl);
            norm += global_dpd_->file2_dot(&Lia, &R1);
            global_dpd_->file2_close(&R1);
            global_dpd_->buf4_init(&R2, PSIF_CC_RAMPS, L_irr, 2, 7, 2, 7, 0, R2BB_lbl);
            norm += global_dpd_->buf4_dot(&Lijab, &R2);
            global_dpd_->buf4_close(&R2);
            global_dpd_->buf4_init(&R2, PSIF_CC_RAMPS, L_irr, 0, 5, 0, 5, 0, R2AB_lbl);
            norm += global_dpd_->buf4_dot(&LIjAb, &R2);
            global_dpd_->buf4_close(&R2);
        } else {
            global_dpd_->file2_init(&R1, PSIF_CC_RAMPS, L_irr, 2, 3, R1B_lbl);
            norm += global_dpd_->file2_dot(&Lia, &R1);
            global_dpd_->file2_close(&R1);
            global_dpd_->buf4_init(&R2, PSIF_CC_RAMPS, L_irr, 12, 17, 12, 17, 0, R2BB_lbl);
            norm += global_dpd_->buf4_dot(&Lijab, &R2);
            global_dpd_->buf4_close(&R2);
            global_dpd_->buf4_init(&R2, PSIF_CC_RAMPS, L_irr, 22, 28, 22, 28, 0, R2AB_lbl);
            norm += global_dpd_->buf4_dot(&LIjAb, &R2);
            global_dpd_->buf4_close(&R2);
        }
        outfile->Printf("\tChecking overlap of initial guess <L|R> = %15.10lf\n", norm);

        global_dpd_->file2_close(&LIA);
        global_dpd_->file2_close(&Lia);
        global_dpd_->buf4_close(&LIJAB);
        global_dpd_->buf4_close(&Lijab);
        global_dpd_->buf4_close(&LIjAb);
    }

#ifdef EOM_DEBUG
    outfile->Printf("initial guess\n");
    dpd_file2_init(&LIA, CC_LAMBDA, L_irr, 0, 1, "LIA");
    dpd_file2_print(&LIA, outfile);
    dpd_file2_close(&LIA);
#endif
}

}  // namespace cclambda
}  // namespace psi
